THE CANADIAN ENTOMOLOGIST 177 



The Nipigon specimens were taken from the open inundated marsh 

 surrounding the island in the Nipigon River. It was not a favourable- 

 looking spot, the swamp vegetation being chiefly Equisetum, Caltlia, 

 coarse sedges, etc., and the specimens taken were the only ones observed, 

 although the ground was gone over thoroughly. 



As in specimens from Anticosti, there is a dark brown subbasal ring 

 on the hind tibire, very distinct on the inner surface. This ring is absent 

 in the Temagami specimen and generally in specimens from Middle and 

 Southern Ontario, though sometimes indicated in the latter. 



The pronotum in the. females is somewhat more incrassate, and the 

 fastigium of the vertex tends to be somewhat broader than in specimens 

 from other parts of Ontario. 



10. Mecostethus gracilis Scudder. 



Very common in open grassy places at Fort William and Nipigon, 

 where its presence can be readily detected by its peculiar stridulation. 

 At Lake Simcoe and Go Home Bay, Georgian Bay, this species is strictly 

 confined to open marshes, where it is often found in company with the 

 preceding species ; but in the north it enjoys a much wider range of 

 habitat, though still inclined to occupy low grounds. M. luieatus, on the 

 other hand, is strictly a marsh form throughout its known range. 



Specimens of M. gracilis from Lake Simcoe agree perfectly with those 

 from Fort William and Nipigon. Unfortunately no females were found, 

 these being remarkably secretive. At Lake Simcoe great variation in 

 wing-length is met with in the females. The tegmina in one individual in my 

 collection measure 24.5 mm. in length, extending 2 mm. beyond the tips 

 of the hind femora, while in another, only slightly smaller in size, they are 

 only 15 mm. long, and fall 5.5 mm. short of the tips of the hind femora. 

 It would be interesting to know if brachypterism is more marked here 

 than in the north. 



11. Arphia pseudonietana Thomas. 



This insect has been recorded by Caulfield from Nipigon and Sud- 

 bury, but I have never met with, it in Ontario. It will probably be found 

 in the Rainy River District. 



A. frigida Scudd. is also likely to be found there, as it is common 

 from Manitoba to the Rocky Mountains. 



12. Camnula pellucida Scudd. 



Abundant at Fort William and Nipigon, and common in open rocky 

 or sandy places in the Temagami District. 



